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Edge exponent in the dynamic spin structure factor of the Yang-Gaudin model

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Cheianov, V. V.
Published in Physical Review. B, Condensed Matter. 2009, vol. 80, no. 20
Abstract The dynamic spin structure factor S(k,ω) of a system of spin-1/2 bosons is investigated at arbitrary strength of the interparticle repulsion. As a function of ω it is shown to exhibit a power-law singularity at the threshold frequency defined by the energy of a magnon at given k. The power-law exponent is found exactly using a combination of the Bethe ansatz solution and an effective-field theory approach.
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ZVONAREV, Mikhail, CHEIANOV, V. V., GIAMARCHI, Thierry. Edge exponent in the dynamic spin structure factor of the Yang-Gaudin model. In: Physical Review. B, Condensed Matter, 2009, vol. 80, n° 20. https://archive-ouverte.unige.ch/unige:36007

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Deposited on : 2014-04-28

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